How to add section of json to the existing file using jq - bash

Question

I am using jq to parse a JSON file. I have some section of JSON file with below content
[
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TNAM"
},
"Key": "Name"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TAPP"
},
"Key": "application"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TENV"
},
"Key": "environment"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TSHA"
},
"Key": "shared"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TTER"
},
"Key": "tier"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "CostCenter"
},
"Key": "cost-center"
}
]
In this I want to add another section like:
{
"Value": {
"Ref": "TEAM"
},
"PropagateAtLaunch": true,
"Key": "TEAM"
}
How can I add this new section?
This is the query I have used to extract the first section:
$ cat ABC.json | jq '.Resources.ASGRP.Properties.Tags'

Answer 1

You can pass the object as a jq variable using --argjson, then use += to add the object to the array:
jq --argjson obj '{"sample": "object"}' '.Resources.ASGRP.Properties.Tags += [$obj]'
If you don't want the original object, use + instead of +=.

Answer 2

Try this "jq -s add ABC.json add.json" as below;
user#host:/tmp$ cat add.json
[
{
"Value": {
"Ref": "TEAM"
},
"PropagateAtLaunch": true,
"Key": "TEAM"
}
]
user#host:/tmp$ jq -s add ABC.json add.json > ABCLAST.json
user#host:/tmp$ cat ABCLAST.json
[
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TNAM"
},
"Key": "Name"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TAPP"
},
"Key": "application"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TENV"
},
"Key": "environment"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TSHA"
},
"Key": "shared"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TTER"
},
"Key": "tier"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "CostCenter"
},
"Key": "cost-center"
},
{
"PropagateAtLaunch": true,
"Value": {
"Ref": "TEAM"
},
"Key": "TEAM"
}
]